12-year-old distance running phenom sets a world record for his age group in Portland, Ore.

At the Portland Track Festival, Silva ran the mile in 4 minutes 43.78 seconds, joining an age-group list of world-record holders that includes former Olympians Jim Ryun, Steve Cram and current USA star Alan Webb. Silva broke the record for 12-year-olds set in 1968 by United Kingdom distance-running star Glen Stewart.